Digital noise

juggernaught1@hotmail.com -- Wed, 03/28/2012 - 08:55

I’m stumped. I have a low level high pitch noise coming from my speakers; it can only be heard with my ear close to the speaker and does not change with volume. On RH’s recommendations I have replaced my power cord and installed a dedicated 20 amp circuit for just my home theater equipment. With all other circuit breakers off in the house the noise is present. It only manifests through the digital inputs. I have the cd/dvd/cable connected via digital coaxial connections. When playing the cd player via analog connection all is perfect. I connected the dvd player via toslink and the noise is the same. Any help would be greatly appreciated. Thanks Brian

Steven Stone -- Wed, 03/28/2012 - 09:48

 Have you tried substituting in another amp or receiver?
I would try replacing parts of your repro chain until you find one part that is the culprit.
 
I suspect that since it is steady state, it is either your amp or your preamp that is causing the problem, not your power. 

Steven Stone
Contributor to The Absolute Sound, EnjoytheMusic.com, Vintage Guitar Magazine, and other fine publications

juggernaught1@h... -- Wed, 03/28/2012 - 10:45

Will try another receiver later today. Of note the noise dosn't start untill I initiate the signal, in other words, I can have the RV8 on say cd>digital>coaxial with no noise untill I push play. Any thoughts? Thanks

juggernaught1@h... -- Wed, 03/28/2012 - 10:43

Will try another receiver later today. Of note the noise dosn't start untill I initiate the signal, in other words, I can have the RV8 on say cd>digital>coaxial with no noise untill I push play. Any thoughts? Thanks

Steven Stone -- Wed, 03/28/2012 - 10:48

 If the problem isn't present with another reciever in your home system, I would try the digital source and your RV8 in another home's system to see if you could repeat the problem. If yes, your RV8 is in need of repair.

Steven Stone
Contributor to The Absolute Sound, EnjoytheMusic.com, Vintage Guitar Magazine, and other fine publications

juggernaught1@h... -- Wed, 03/28/2012 - 12:59

Thanks Steven, I followed your suggestion and replaced with different AVR and found there was no noise. This led me to open my RV8 and found a din plug inside was slightly loose, this fixed the promblem :) Hope this helps others. Brian

Steven Stone -- Wed, 03/28/2012 - 15:55

Cool. Troubleshooting works! :)

Steven Stone
Contributor to The Absolute Sound, EnjoytheMusic.com, Vintage Guitar Magazine, and other fine publications

JLeeMD -- Wed, 03/28/2012 - 12:46

I had the same problem and after swapping out component after component in order to isolate the source, I concluded the sound was from the transformer in my Mark Levinson integrated amplifier.  James Tanner at Bryston and Andrew at Mark Levinson graciously helped me troubleshoot.  Tanner told me that if I could only hear the sound with my ears close to the speaker, I was actually doing pretty well.  So I just lived with it.  Then one day I upgraded my power condiitoner from PS Audio Power Plant Premier to Synergystic Research PowerCell 10 mk2 and the sound vanished.  Forever.

juggernaught1@h... -- Wed, 03/28/2012 - 13:01

Thanks for your reply. I found the issue was related to a loose din plug inside, with a little wiggle the noise went away. Brian

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